All of these function will return co-ordinates.

• c2p - coords to points (ndarray)

• get_origin - returns the origin coordinates. (ndarray)

• input_to_graph_points(x,graph) - returns ($ndarray$)
  alias i2gp(x,graph)

• input_to_graph_coords(x,graph) - returns ($x,f(x)$)
  alias i2gc(x,graph)

• polar_to_point(r,theta(in rad))-returns the polar coordinates